Firmware that decoded the BCD encoded by wwv on HF would be a pretty neat party trick for a portable rig though ;-)
On Mon, 2013-12-02 at 15:49 -0800, Walter Underwood wrote: > The KX3 Utility could estimate the clock adjustment, if it is the only thing > that sets the clock. It knows the time it was last set and can measure the > drift. > > wunder > K6WRU > > On Dec 2, 2013, at 3:43 PM, Fred Jensen <[email protected]> wrote: > > > Actually ... "atomic clocks" such as the UTC one hanging on the wall of my > > shack [that I won at radio club raffle] don't "poll 10MHz." They listen > > for WWVB on 60KHz, which mine hears only at night here in CA. WWVB > > broadcasts a continuous IRIG-H time code with a somewhat obscure AM > > modulation scheme [they recently added the same time code using a phase > > modulation scheme *very* loosely resembling PSK-31]. Doing this in the K3 > > would require a 60KHz receiver, demodulator, decoder, and probably a > > ferrite antenna. > > > > Whether or not mine updates at night depends on a number of factors, not > > the least of which is ambient noise. It usually is in sync with WWV on any > > of the MF and HF frequencies, but that's not guaranteed, I just checked and > > it's about 35 secs slow now. My dive watch does vastly better. :-) > > > > I volunteer at the local blood bank and recording times is important to the > > documentation of the process. Consequently, they installed "atomic > > clocks", our little center has 5 of them, not all the same mfr, scattered > > around to be visible to the staff. I've watched them differ by more than > > 90 seconds at times, and rarely are any two of them in sync. > > > > I assume my K3 runs the clock [which I never use] off the one of the > > processor clocks. I recently built a 40-station irrigation controller for > > my wife [we live on 5 acres and she's a kamikaze gardener] using the > > Hamstack components. Their C-library includes a clock adjustment > > capability. I have two separate CPU's, one is a little fast and one is > > just a tad slow. I now have them adjusted so they're within a second or > > two of each other after a month or so. Maybe the K3 could include > > something like that, accessible through the K3 Utility? > > > > 73, > > > > Fred K6DGW > > - Northern California Contest Club > > - CU in the 2014 Cal QSO Party 4-5 Oct 2014 > > - www.cqp.org > > > > On 12/2/2013 12:14 PM, Todd Atkins wrote: > >> I wonder how easy/hard it would be to have the radio poll 10Mhz (like the > >> atomic clocks do) every so often when powered on, to keep the time more > >> accurately. That would be a pretty cool feature. > >> > >> Todd, K4MSW > > > > > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:[email protected] > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > -- > Walter Underwood > [email protected] > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html -- 73 Brendan EI6IZ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
